Cable detector

Abstract

A cable detector has a plurality of rotatably series connected hooks having an opening mouth for accepting a cable on sea bottom with an equal angular intervals, a contact pressure sensing means for indicating that a cable is engaged with one of said hooks by measuring contact pressure on one of the hooks, and an electrical switch which is actuated by said contact pressure sensing means to provide an electrical signal when a cable is detected.

What is claimed is: 
     
       1. A cable detector for detecting a cable under water comprising a contact pressure sensing member, a switch member activated by output of said contact pressure sensing member, a plurality of hook members connected in series and a plurality of connectors each connecting adjacent two hook members by pin joints, each of said hook members having a slidable slide hook within an open entrance therein for receiving the cable, each of said connectors being provided with a through hole and further provided with a tapered opening at both ends thereof, and a wire rope connecting adjacent two slide hooks passing through said holes, and said wire rope being further connected to said contact pressure sensing member. 
     
     
       2. A cable detector according to claim 1, wherein the number of said hook members is at least four. 
     
     
       3. A cable detector according to claim 1, wherein adjacent open entrances are rotated 90° from one another with adjacent open entrances are rotated 90° from one another with respect to the axis of said cable detector. 
     
     
       4. A cable detector according to claim 1, wherein adjacent open entrances are rotated 360/N degrees when the number of hook members is N. 
     
     
       5. A cable detector according to claim 1, wherein said switch means has a lead switch, a permanent magnet for actuating said lead switch, and a ferro-magnetic chip for selectively actuating said lead switch responsive to shift of the chip.